Sorry Jonty, missed your post
It's a bit tenuous but I was first thinking of a skewer as in to baste the elf on a BBQ (ish)
But now I'm thinking, to skewer is to fasten and to baste (in needlework) is also to fasten. Then it works a bit like an &lit because the fasten actually fastens in the word 'elf' and is shortened (small) to Bast (-e)
Maybe it's a long shot and maybe someone else can offer something more concrete
What do you think?